scholarly journals Study The Consequence of Fly Ash on Some of Physical Soil Characteristics

2022 ◽  
Vol 961 (1) ◽  
pp. 012089
Author(s):  
Najwa Wasif Jassim ◽  
Shaymaa alsafi
Keyword(s):  
Fly Ash ◽  
Internal Friction ◽  
Soil Sample ◽  
Soil Classification ◽  
Soil Characteristics ◽  
Soil Samples ◽  
Plasticity Index ◽  
Atterberg Limit

Abstract Study the consequence of adding fly ash (FA) on the Atterberg limit; cohesions and internal friction of angles of the verified soil was the aim of this search. The tested soil according to the system of unified soil classification was (CH) group. Fly ash (FA) was added to the tested soil samples in 1, 3, 6, 9, 12, 15 & 18 % by weight of samples. This study shows that once the tested soil mixed with (FA); the values of cohesion reduced; while the values of the angles of internal frictions increases. The drop in the soil sample cohesion when mixed with 18% of (FA) was 34%, were noteworthy increase in the angles of internal friction. For all soil samples as the percentages of adding (FA) increase, the decrease in the index of plasticity amounts increase also at different rates. The adding of (FA) produced a reduction in the liquid limits; plastic limits and henceforth the plasticity index of the tested soil sample at rate of 43%, 48% and 37% correspondingly. The plasticity index losses took place at the first 3%, at a lesser rate, then the rate increased at 18% of additive and because nearly constant.

scholarly journals Properties of Some Selected Soil under Mymensingh District in Bangladesh

1970 ◽  
Vol 4 (1) ◽  
pp. 149-154
Author(s):  
Md. Tohidul Islam ◽  
Md. Serazul Islam ◽  
Md Nurul Hoque
Keyword(s):  
Shear Stress ◽  
Internal Friction ◽  
Moisture Content ◽  
Physical Properties ◽  
Key Words ◽  
Friction Angle ◽  
Soil Samples ◽  
Plasticity Index ◽  
Standard Methods ◽  
Different Soils

This paper elucidated an attempt to determine the physical properties of some selected soils at different location under Mymensingh districts. The properties of soils were determined using standard methods. Field moisture content was more or less similar for all the locations. The dry unit weights of selected seven soils for Bangladesh Institute of Nuclear Agriculture (BINA), Valuka, Muktagacha, Trisal, Madhupur, Chorkhai and Shomvoganj sites were found to be 17.61, 16.50, 17.00, 17.50, 15.50, 16.40 and 16.20 kN/m3, respectively while the specific gravities were found as 2.67, 2.66, 2.68, 2.70, 2.69, 2.72 and 2.65, respectively also the values of plastic limits of soils were found to be 16.00, 17.00, 15.50, 18.50, 16.00, 17.20 and 14.00 percent, respectively whereas the plasticity index values were 16.25, 14.50, 15.00, 17.00, 18.00, 13.60 and 15.50 percent, respectively for the above locations. The liquid and plastic limits varied for all the locations but the plasticity index values were found more or less similar for all the soil samples. The friction angles were found more or less similar while cohesion varied for different locations. The properties of soils thus obtained can be used for soils of these areas of Bangladesh. A relation between the gradations with plasticity indices of different soils was also characterized. Key words: Dry unit weights, plastic limits, plasticity index, shear stress and internal friction angle.

Potential Use of Groundnut Shell Ash as Soils Strength Enhancer

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
A. M. Salman
Keyword(s):  
Soil Classification ◽  
Soil Samples ◽  
California Bearing Ratio ◽  
Size Analysis ◽  
Atterberg Limit ◽  
Sieve Size ◽  
Limit Test ◽  
Groundnut Shell ◽  
Potential Use ◽  
Groundnut Shell Ash

This research investigates the potential use of groundnut shell ash (GSA) as soils strength enhancer. The GSA was used as admixture on selected soil samples from four different locations and samples were named T1, T2, T3 & T4. The tests carried out on the samples include Atterberg limit, sieve size analysis, soil hydrometer, compaction and California bearing ratio (CBR), X-ray fluorescence (XRF). Sieve size analysis, soil hydrometer test, Atterberg limit test were used to classify soil samples’ properties and classification was done as per AASHTO soil classification system. Sample T1 was classified as A-6, samples T2, T3 and T4 were classified as A-4. GSA was added to the soil samples; 2, 4, 6, 8, 10 and 15% of GSA by weight of soil samples. Compaction test and California bearing ratio (CBR) were carried out on soil samples with added GSA. Results from XRF showed that SiO2 + Al2O3+ Fe2O3 = 25.61%. For GSA to be classified as pozzolan, SiO2 + Al2O3+ Fe2O3 ≥ 70% as per ASTM C618 – 08. Therefore, GSA cannot be classified as pozzolan as it does not meet requirement stipulated in ASTM C618 but rather as inert pores filler. Based on the results from compaction and CBR, the study showed that 4-8% of GSA was found to have improved and enhanced the strength of the soil samples.

Comparison of shrink-swell indices of some Saskatchewan soils and their relationships to standard soil characteristics

1992 ◽  
Vol 72 (4) ◽  
pp. 429-439 ◽  
Author(s):  
E. De Jong ◽  
L. M. Kozak ◽  
H. B. Storehouse
Keyword(s):  
Surface Area ◽  
Linear Extension ◽  
Clay Content ◽  
Soil Characteristics ◽  
Soil Samples ◽  
Plasticity Index ◽  
Soil Profiles ◽  
Undisturbed Samples ◽  
Standard Soil ◽  
Highly Correlated

Shrink-swell indices for 27 soil samples (representing the major horizons of eight soil profiles) were determined and related to soil texture, organic and inorganic C content, and specific surface area. The coefficient of linear extension was measured from saturation and from 33 kPa matric suction to oven-dryness on undisturbed clods (COLEclod) and on remolded samples of the less than 2-mm fraction (COLErod); the Atterberg limits were determined on the less than 0.4-mm fraction. COLEclod, COLErod and the plasticity index were highly correlated with each other and with clay content and surface area, but not with organic or inorganic C. The extent of the shrinkage was significantly (P > 0.01) related to the water content at the start of the shrinkage test; this relationship was clearer for the remolded than the undisturbed samples, possibly due to the structure of the clods. Key words: Coefficient of linear extension, plasticity index, clods vs. remolded, texture, organic carbon

KEBERADAAN BAKTERI PELARUT FOSFAT DAN AKTIVITAS ENZIM FOSFATASE TANAH DAERAH PERAKARAN TANAMAN OBAT DARI KEBUN RAYA CIBODAS

2018 ◽  
Vol 6 (3) ◽  
Author(s):  
Suliasih Suliasih
Keyword(s):  
Alkaline Phosphatase ◽  
Soil Sample ◽  
Rhizosphere Soil ◽  
Botanical Garden ◽  
Soil Enzyme ◽  
Soil Samples ◽  
Phosphate Solubilizing Bacteria ◽  
Bacillus Sp ◽  
Phosphate Solubilizing ◽  
Serratia Rubidaea

A study was undertaken to investigate to occurance of phosphate solubilizing bacteria from rhizosphere soil samples of medicine plants in Cibodas Botanical Garden. 13 soil samples of medicine plants are collected randomly The result shows that 71 isolates of phosphate solubilizing bacteria were isolated, and 10 species of these organism was identified as Azotobacter sp, Bacillus sp, Chromobacterium sp, C.violaceum, Citrobacter sp. , Enterobacter sp., E. liquefaciens. Nitrosomonas sp., Serratia rubidaea, Sphaerotillus natans. Azotobacter sp. And Bacillus sp. Are found in all of soil tested. Conversely, Serratia rubidaea is only in the sample from rhizosphere of Plantago mayor The activity of acid alkaline phosphatase in soil tested ranged from 0.78 – 60,18 ugp nitrophenole/g/h, with the higest values being recorded in soil sample from rhizosphere of “Lavender”.Keywords : phosphate solubilizing bacteria, soil enzyme phosphatase

Evaluation of Nanotechniques and Conventional Techniques for the Removal of Dioxins

2018 ◽  
Vol 9 (1) ◽  
pp. 79-84
Author(s):  
Vaishali V. Shahare ◽  
Rajni Grover ◽  
Suman Meena
Keyword(s):  
Soil Sample ◽  
Human Health ◽  
Surface Area ◽  
Contaminated Soil ◽  
Conventional Treatment ◽  
Volume Ratio ◽  
Soil Samples ◽  
Dioxins And Furans ◽  
Palladized Iron ◽  
The Impact

Background: The persistent dioxins/furans has caused a worldwide concern as they influence the human health. Recent research indicates that nonmaterial may prove effective in the degradation of Dioxins/furans. The nanomaterials are very reactive owing to their large surface area to volume ratio and large number of reactive sites. However, nanotechnology applications face both the challenges and the opportunities to influence the area of environmental protection. Objective: i) To study the impact of oil mediated UV-irradiations on the removal of 2,3,7,8-TCDD, 2,3,7,8-TCDF, OCDD and OCDF in simulated soil samples. ii) To compare the conventional treatment methods with the modern available nanotechniques for the removal of selected Dioxins/furans from soil samples. Methods: The present work has investigated an opportunity of the degradation of tetra and octachlorinated dioxins and furans by using oil mediated UV radiations with subsequent extraction of respective dioxins/furans from soils. The results have been compared with the available nanotechniques. Results: The dioxin congeners in the simulated soil sample showed decrease in concentration with the increase in the exposure time and intensity of UV radiations. The dechlorination of PCDD/Fs using palladized iron has been found to be effective. Conclusion: Both the conventional methods and nanotechnology have a dramatic impact on the removal of Dioxins/furans in contaminated soil. However, the nanotechniques are comparatively costlier and despite the relatively high rates of PCDDs dechlorination by Pd/nFe, small fraction of the dioxins are recalcitrant to degradation over considerable exposure times.

Assessment of Irrigation Quality of Disposal Water of Ashuganj-Polash Agro-Irrigation Project, Brahmanbaria Bangladesh

2017 ◽  
Vol 4 (04) ◽  
Author(s):  
ABDUR RAZZAK ◽  
PARSA SANJANA ◽  
BELAL HOSSAIN ◽  
DEBJIT ROY ◽  
BIDHAN CHANDRA NATH
Keyword(s):  
Soil Sample ◽  
Water Samples ◽  
Crop Production ◽  
Soil Samples ◽  
Chemistry Laboratory ◽  
Total Hardness ◽  
Sodium Absorption ◽  
Irrigation Project ◽  
Crop Field ◽  
Initial Soil

The study was conducted at Ashuganj-Polash agro-irrigation project (APAIP), Brahmanbaria,aim to determine the chemical properties of power plant disposal water and to assess its suitability for irrigation. Initial soil samples (before irrigating crop field) and final soil samples (after crop harvesting) were collected. During irrigation ten water samples (six from crop field and four from irrigation canals) were collected for analysis. All soil samples were analyzed in Humboldt soil testing laboratory and water samples in bio-chemistry laboratory of Bangladesh Agricultural University and compared to FAO irrigation standard. Results show thatthe sodium absorption ratio (SAR) (0.53 to 0.88), residual sodium bi-carbonate (0.8 to 1.3meq L-1), Kelly’s ratio (0.31 to 0.6) and total hardness (85 to 150) found in normal range and largely suitable for irrigation. Soluble sodium percentage values found in satisfactory (20.26 to 41.1) level and magnesium absorption (57.1 to 76.4) found unsuitable for irrigation. Statistically similar value of pH, EC, total nitrogen, organic carbon, calcium, magnesium and phosphorus in initial and final soil sample were observed. But potassium and sulfur value reduced in final soil sample from initial soil. The water samples fall within the permissible limit and found suitable for crop production

Comparative study of Cs-137 activity concentration between attic dust and urban soil from Salgotarjan city, Hungary

2021 ◽  
Author(s):  
Davaakhuu Tserendorj ◽  
Katalin Zsuzsanna Szabó Szabó ◽  
Peter Völgyesi Völgyesi ◽  
Gorkhmaz Abbaszade ◽  
Do Le Tan Tan ◽  
...  
Keyword(s):  
Fly Ash ◽  
Soil Sample ◽  
Forest Soil ◽  
Urban Environment ◽  
Urban Soil ◽  
Urban Soils ◽  
Activity Concentration ◽  
Nuclear Accidents ◽  
Undisturbed Soil ◽  
Attic Dust

<p>The <sup>137</sup>Cs (t<sub>1/2</sub> =30 years) is a principal radioisotope that was artificially introduced into the environment through the atmospheric bomb tests took place from the middle of the 1940s to the 1980s and from the major nuclear accidents (i.e., Chernobyl, 1986 and Fukushima, 2011). From the atmosphere, <sup>137</sup>Cs easily adsorbs to particles and it returns to lithosphere (pedosphere) by wet and dry deposition as a radioactive fallout component. Due to the Chernobyl nuclear accident, the released contaminated air mass, containing Cs-137, largely propagated, deposited, and distributed across several European countries in the ambient environment (Balonov et al., 1996). These particles also reached houses (e.g. through open windows, cracks, and vents) in an urban environment and deposited inside resulting in the exposition of the habitants to <sup>137</sup>Cs, especially in areas that are not accessible for a regular cleaning like attics. Following the nuclear accidents, primary attention was drawn to agricultural areas and less attention was paid to urban environments. Accordingly, the goal of this study is to compare the <sup>137</sup>Cs activity in attic dust as undisturbed samples, and urban soils as disturbed environmental materials to determine the <sup>137</sup>Cs distribution in urban environment. </p><p>Attic dust (AD) samples were collected from 14 houses, which were built between 1900 and 1990 14 urban soil (US) samples were collected nearby the houses at a depth of 0-15 cm in Salgótarján, a former industrial city. To obtain a representative local undisturbed soil sample, a forest soil sample was collected from the upwind direction (NW) of the city. To check the <sup>137</sup>Cs content of the local industrial waste material, we also collected fly-ash slag sample from a waste dump.   AD and US samples were analyzed by a well-type HPGe and with an n-type coaxial HPGe detector in a low background iron chamber, respectively.</p><p>Cs-137 activity in the studied AD ranges from 5.51±0.9 to 165.9±3.6 Bq kg<sup>-1, </sup>with a mean value of 75.4±2.5 Bq kg<sup>-1 </sup>(decay corrected in 2016). In contrast, US samples show <sup>137</sup>Cs activity ranging between 2.3±0.4 and 13.6±0.6 Bq kg<sup>-1</sup>.  The brown forest soil sample has elevated <sup>137</sup>Cs activity concentration (18.5<strong>±</strong>0.6 Bq kg<sup>-1</sup>), compared to the urban soils. The fly-ash slags activity is below the detection limit (0.7±0.5 Bq kg<sup>-1</sup>).</p><p>The average <sup>137</sup>Cs activity in AD is ~15 times higher than that of US. This result clearly indicates that attic area provides a protected (hardly or unchanged) environment, therefore physical condition of the dust remains constant in time, and there is a small chance for chemical reaction. Forest soil proves that US were highly disturbed by anthropogenic activity. This is supported by fly-ash slag activity results.  Whereas, <sup>137</sup>Cs activity concentration of the AD samples shows significantly higher than that of the studied soils in Hungary. This confirms again US cannot show the historical atmospheric <sup>137</sup>Cs pollution such as attic dust. A statistically significant relationship (p=0.003, r<sup>2</sup>=0.05) were found between the AD and US samples. Therefore, it can be considered that attic dust remained undisturbed for decades and preserve past record of components of atmospheric pollution.</p><p> </p><p> </p>

scholarly journals Stabilization of Algerian Clayey Soils with Natural Pozzolana and Lime

2017 ◽  
Author(s):  
Khelifa Harichane ◽  
Mohamed Ghrici ◽  
Said Kenai
Keyword(s):  
Shear Strength ◽  
Internal Friction ◽  
Friction Angle ◽  
Internal Friction Angle ◽  
Plasticity Index ◽  
Engineering Properties ◽  
High Plasticity ◽  
Expansive Clay ◽  
Clayey Soils ◽  
Natural Pozzolana

Cohesive soils with a high plasticity index present difficulties in construction operations because they usually contain expansive clay minerals. However, the engineering properties of soils can be improved by different techniques. The aim of this paper is to study the effect of using lime, natural pozzolana or a combination of both lime and natural pozzolana on plasticity, compaction and shear strength of two clayey soils classified as CH and CL according to the unified soil classification system (USCS). The obtained results indicated that for CH class clay soil, the plasticity index decreased significantly for samples stabilized with lime. On the other hand, for the soil classified as CL class clay, a high decrease in the plasticity index value was observed for samples stabilized with natural pozzolana compared to those stabilized with lime. Also, both the cohesion and internal friction angle in lime added samples were demonstrated to increase with time. The combination of lime and natural pozzolana exhibits a significant effect on the enhancement of both the cohesion and  internal friction angle at later stages. The lime-natural pozzolana combination appears to produce higher shear strength parameters than lime or natural pozzolana used alone.

scholarly journals Mineralogy of Gypsiferous Soil and the Effect of a dditiveLime Stone waste powder on its Physical Properties

2020 ◽  
pp. 83-91
Author(s):  
Thalar Othman Rashid ◽  
Nadhmia Najmaddin Majeed
Keyword(s):  
Grain Size ◽  
Specific Gravity ◽  
Soil Type ◽  
Soil Classification ◽  
Limestone Powder ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Atterberg Limit ◽  
Gypsum Content ◽  
Physical Testing

The presence of gypsum in soil as bonding agent alters its behavior with a large influence on itsphysical properties.Soil samples were taken from two locations of different gypsum content(S1 = 30.5% and S2= 20%) inMakhmur area. TheUnified soil classification system indicated that soil type was clay with low plasticity(CL). Basic methods of physical testing of soils, such as grain size analysis,specific gravity and atterberg limit were applied. Stabilizationof the gypsiferous soil was performed by addinglimestone waste powder takenfrom Said sadiqandPirmam areas,with different percentages(5%, 15%,25%).The results show that the addition of limestone powder to the tested soils decreases their liquid and plastic limits.

scholarly journals Relações entre características químicas do solo e crescimento de Araucaria angustifolia (Bert.) O. Ktze., em Passo Fundo, RS

1983 ◽  
Vol 5 (5) ◽  
pp. 95
Author(s):  
Carmeli Antonia Cassol ◽  
Ari Zago
Keyword(s):  
Soil Characteristics ◽  
Soil Samples ◽  
Soil Types ◽  
Chemical Characteristics ◽  
Araucaria Angustifolia ◽  
Gley Soil ◽  
Growth Variation ◽  
Chemical Soil

The present work shows chemical soil characteristics and growth in plantings of Araucaria angustifolia, implanted in different soil types, in Passo Fundo, RS National Forest.Soils types were classified as Latosol Roxo, Lithosol Eutrophic Soil and Low-Humic Gley. Soil samples were taken randomly at 0 - 20cm deep in 400 m² area square plots. The chemical characteristics of the studied soils were related to growth variables by simple linear correlation.According to the findings, the chemical soil chemical characteristics were not considered adequate parameters to explain the growth variation observed for Araucaria angustifolia.

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